Horseshoe



N0. 6|0,476. Patented Sept. 6, uses. G. w. DAVENPORT.

HORSESHOE.

(Application filed Feb. 18, 1898.)

(No Model.)

WITNESSES: mvemom A fl, 4W fiwamug ewllmwem aoamlg v BY ATTORNEYS.

UNITED STATES PATENT FFICE.

GEORGE IV. DAVENPORT, OF VERONA, NEW JERSEY, ASSIGNOR OF ONE} HALF TO WALTER T. CRANE, OF NEWARK, NEWV JERSEY HORSESHOE.

SPECIFICATION forming part of Letters Patent No. 610,476, dated September 6, 1898.

Application filed February 18, 1898. Serial No. 670,763- (No model.)

T 0 all whom it may concern.-

Be it known that I; GEORGE W. DAVEN- PORT, a citizen of the United States, residing at Verona, in the county of Essex and State of New Jersey, have invented certain new and useful Improvementsin I-Iorseshoe-Oalks; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

This invention relates to that class of horseshoes in which the calksare made in pieces separable from the body'of the shoe, the said calks being removable to permit a quick and ready exchange of a worn or dulled calk for a new or sharp one, the object of the invention being to obtain a more secure adjustment of said removable calk upon the shoe; to provide one that can be easily and'quiokly removed and replaced at will; to reduce the cost of construction, and to secure other advantages and results, some of which may be referred to hereinafter in connection with the description of the working parts.

The invention consists in the improved horseshoe and in the arrangements and combinations of parts of the same, allsubstan tially as will be hereinafter set forth, and finally embraced in the clauses of the claim.

Referring to the accompanying drawings, in which like letters of reference indicate corresponding parts in each of the several views, Figure 1 is a ground-plan of the shoe. Fig. 2 is a section of the same, taken on line a. Fig. 3 is a section on line y, and Fig. 4 is a detail perspective View of a certain fastening washer or collar for securing the calk to the heel or toe of the shoe.

In said drawings, a indicates the body of the horseshoe, of any suitable construction. I) b are the calks thereof, arranged at the heel and toe portions of said shoe or at either of such portions. The said shoe-body, where said calks are attached, is provided with perforations c, as indicated in Figs. 2 and 3, of a circular cross-section. The inner walls of said perforations may be formed at right angles to the plane of the shoe, as in Fig. 3,

or may be slightly tapering to form a slight reduction in width of the'opening or perforation at the lower side of a shoe, asin Fig. 2. The perforations of uniform diameter in prac tice have secured very satisfactory results. The calks b consist of the sharpened projecting portion 1), adapted to engage the ground, said portion being preferably of a conical shape in general outline. Above said conical part is formed a short shank b, of a diameter equal to the diameter of the perforation and adapted to fit closely therein. This shank b" is of a length equal to about onethird of the thickness of the shoe, more or less. Above said short shank is a smaller extension 19, which is threaded, as at b, the parts I)" and 13' together being of a length equal to or approximately equal to the thickness of the shoe, as will beseen upon examporosity to permit dampness to enter therethrough, which, being brought into contact with the metal walls, causes an oxidation of said walls, so that the parts are held securely in very rigid and permanent locking engagement by frictional contact. The said washer is first inserted in place in the perforation and then the calk screwed into posi tion, or in those constructions in which the perforation is of uniform bore the washer may be screwed onto the calk and the calk then driven or forced into place in the shoe. I find in practice that the calk with its collar tightly forced into place, as shown, is held therein even though the calk is subjected to great jarring strain, due to the animals traveling over the pavement, the non-metallic washer serving to permit a slight action of the calks within the collar, the latter cushioning the action by its elasticity in such a manner as to prevent detachment or working loose. The cushion-like collar, however, permits a withdrawal of the calk when drawn by a lever like tool catching said calk in the recess 6, and thus the renewal of calks can be easily and quickly eifected without removing the shoe from the animals foot. Moreover, the calk is more firmly and securely held than if the non-metallic washer extended through the entire thickness of the shoe or to a point flush with the lower surface of the shoe, a construction which I do not claim. The short shank b" fits into the lower part of the perforation and gives the calk a solid metallic seat in the shoe and one which permits no lateral movement. The threaded part of the shank lies in the upper part of the perforation and is surrounded by the non-metallic material. length of non-m etallic material is sufficient to hold the calk against withdrawal, and by having it thus shortened at the lower end the metallic seat is secured. The washer is hard enough to hold the shank in a central position with firmness, while at the same time sufficiently elastic to yield imperceptibly to jars and shocks.

Having thus described the invention, what I claim as new is 1. The combination with the perforated body of the horseshoe, of a calk I), having a shank b lying in said perforation, and a reduced threaded extension b', and a non-metallic washer arranged on said threaded extension, the said non-metallic washer being arranged between the inner walls of the said This perforation and the threaded shank, substantially as set forth.

2. The combination with the perforated body of a horseshoe, of a removable calk having a shank inserted in said perforation, a portion of the length of said shank being directly in contact with the inner walls of the perforation and the other portion having a non-metallic collar lying between, substantially as set forth.

3. The combination with the perforated body of the horseshoe, of a calk having a shank fitting into the lower part of the perforation and a reduced extension extending into the upper part, and a collar of indurated fiber arranged upon said extension and being pressed between said extension and the walls of the perforation, substantially as set forth.

4:. The combination with the perforated body of a horseshoe, of a calk having a shank lying in said perforation, the-lower part of said shank fitting closelytherein and the upper part being inclosed by a non-metallic washer which at its outer periphery is in contact with the walls of the perforation, substantially as set forth.

In testimony that I claim the foregoing I have hereunto set my hand this 14th day of February, 1898.

GEORGE W. DAVENPORT.

Witnesses:

CHARLES H. PELL, C. B. PITNEY. 

